131507664501 has 4 divisors (see below), whose sum is σ = 175343552672. Its totient is φ = 87671776332.

The previous prime is 131507664487. The next prime is 131507664539. The reversal of 131507664501 is 105466705131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131507664501 - 2²⁷ = 131373446773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131507664501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131508664501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21917944081 + ... + 21917944086.

It is an arithmetic number, because the mean of its divisors is an integer number (43835888168).

Almost surely, 2^131507664501 is an apocalyptic number.

It is an amenable number.

131507664501 is a deficient number, since it is larger than the sum of its proper divisors (43835888171).

131507664501 is an equidigital number, since it uses as much as digits as its factorization.

131507664501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43835888170.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 131507664501 in words is "one hundred thirty-one billion, five hundred seven million, six hundred sixty-four thousand, five hundred one".